“The sea raises you to your feet. And dead calm.
Strands of light hold your hand. Now you have left
this shore. Now you are in the wind of an invisible sail.”
Mirkka Rekola, Kuka lukee kanssasi (Who is Reading with You), 1990; Translated by Sari Hantula. Quoted at Mirkka Rekola http://www.electricverses.net/sakeet.php?poet=22&poem=645&language=3, at electricverses.net, accessed 20-03-2017.
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Mirkka Rekola 22
Finnish writer 1931–2014Related quotes

“You are not free. Myriad invisible hands hold your hands and direct them.”
The Saviors of God (1923)
Context: You are not free. Myriad invisible hands hold your hands and direct them. When you rise in anger, a great-grandfather froths at your mouth; when you make love, an ancestral caveman growls with lust; when you sleep, tombs open in your memory till your skull brims with ghosts.

"Seeing It Through", London Transport poster by Eric Kennington (1944).

This quote has been attributed to Mark Twain, but the attribution cannot be verified. The quote should not be regarded as authentic. — Twainquotes http://www.twainquotes.com/Discovery.html
Actually from the 1990 book P. S. I Love You' https://books.google.com/books?id=5OORXU6rlGIC&q=bowlines#v=onepage&q=bowlines&f=false' by H. Jackson Brown.
Misattributed

“When you can’t change the direction of the wind — adjust your sails”